Method of forging fulcrums



Jan. 24, 1928.

L. L. WHITNEY METHOD OF FORGING FULCRUMS 2 Sheets-Sheet 1 Filed Jan, l924 [706W- [Ofem I 7/ Jan. 24, 1928.

Filed Jan. 9, 192 4 Maw: [0/1222 Z r Patented Jan. 24, 1928,

UNITED STATES 1,656,929 PATENT OFFICE,

Lonrnv L. WHITNEY, or HAMMOND, INDIANA, nssrenon TO AMERICAN srnm;

ronnnzarns, or onrcaoo, rumors, A oonronarron or new annsnv;

a reunion onronerrteromantics,

Application filed January 9, 1924. Serial No. 685,076.

This invention relates to a method of forging fulcrums.

One object of this invention is to provide a simple, eflicient and improved method of forging fulcrums whereby a" stronger and better finished fulcrum may be made at a reduced cost.

Another object is to provide a method of forging fulcrums adapted to meet the various requirements for the commercial production of fulcrums. These and other objects are accomplished by means of the method oisclosed on the accompanying sheets of drawings, iii' ivliicl' i- 5 Figure 1 is a fragmentary side elevation of a blank from which the fulcrum is to be forged;

Figure 2 is an end view thereof; Figures 3, 4and 5 are top, side and end views respectively, of one end of the blank after the latter has been upset to accumulate enough stock at that end to form jaws;

Figures 6, 7 and 8 are top, side and end views respectively, of the same blank after 25 that end has been hot-sawed, split, punched or spread preparatory to forming aws;

Figures 9, 10 and 11 are top, side and end views, respectively, of the same end of the blank after the blank has been subjected to pressure for giving final shape and finish to said jaws;

Figure 12 is a side elevation of the opposite end of the blank;

Figure 13 is an end View thereof;

Figures 14, 15 and 16 are top, side and end views, respectively, of the second end of the blank after it has been upset;

Figures 17, 18 and 19 are top, side and end views respectively,-of the second, end of the blank after the latter has been spread with a parting tool preparatory to forming aws;

1 Figures 20, 21 and 22 are top, side and end views respectively, of the second end of the blank after the jaws have been completed and bearing lugs formed to prevent pivoting of the fulcrum,

Figures 23 and 24 are top and side views of the completed fulcrum with registered openings formed in the jaw members for the reception of a fulcrum pin in one end and a rivet in the other;

Figure 25 is a top plan view of a flat bar beam to which fulcrums formed by the method above indicated are secured;

.Figure 26 is a sectional view of stationary and movable dies by means of which one end of the fulcrum is formed; and

Figure 27 is a similar sectional view of stationary and movable dies by means of which the other end of the fulcrum is formed The various novel features of the invention will be apparent from the following descriptionland drawings, and will be particu larly pointed out in the appended claims.

Referring to the figures'of the drawings, it will be noted that a blank 30, in this instance of round stock, is provided having two end portions 31 and 32. The end 31 is first heated and then placed in adie and upset to build up sulficient stock '33 preparatory to forming jaws. The stationary die portion, 1 as shown at 34 in the dieblock 35 of Figure 26, is used for such upsetting and also a movable die 36. The upsetportion of this first end 31 of the blank is then hotsa'wed, split, punched or spread to provide a longitudinally extending opening 37 as shown in Figures 6, 7 and 8, to form jaw portions 38. The same end of the blank is then placed in the stationary portion 39 ofthe die block 35 and subjected to further pressure by the movable die member 40 to form the completed jaws 41, as shown in Figures 9, 10 and 11.

The other or second end 32 of the blank "is then heated and upset to build up stock at 42, as shown in Figures 14, 15 and 16. In

:this instance the second end 32 of the blank is placed in the stationary die portion 43 in die block 44 and subjected to pressure by a movable die member 45. The second end of the blank is then placed in the stationary die portion 46 and subjected to further pressure by the movable die 47 to spread the metal at that end for partially forming jaws 48, as

shown in Figures 17, 18 and 19. The second 7 end of said blank is then placed in the stationary die portion 49 of the die block 44 and subjected to further pressure by a movable die member 50 for completing the jaws 48 ,and, at the same time forming oppositely 6X- tending bearing lugs 51 to prevent pivoting of the fulcrum, as shown particularly in Figures 20, 21, 22 and 25. Registering openings 52 are then formed in the jaws 41 and registering openings 53 formed in the jaws 48, as shown in Figures 23 and 24, for completing the fulcrum.

In Figure 25 the fulcrums are shown as applied to a [lat liar beam fit to the ende of which lever hangers 55 may he attached. Between the 'aws ll of each fulcrum there is received a rake lever 56 which is pivotally connected to the jaws by a pin 57 pass ing through the registering openings 52 in the jaws and through an opening in the brake lever. Another pin or rivet 58 extends through the registering openings 53 in the jaws &8 and also through the flat bar beam 54 for securing the fulcrum to said beam 54, and it will he noted that the hearing;- lugs bear against an edge oi the beam 54- l'or preventing pivotal movement of the 'lulerunii with respect to said beam.

By means of the simple, eiiicient and unproved method hereinahove described a brake beam fulcrum may be forged which is stronger and has a better finish, and produced at a cost lower than tuleruins hereto-- fore made.

It is my intention to cover all inodifications of the invention falling within the spirit and scope of the Following claims.

I claim:

1. The method of forging a fulcrum consisting in providing a hlanln heat-in same, upsetting one end tlieieo't to accuinnla tesuilicient metal to form jaws, tlorining a longritudinal opening in said upset end to provide spaced jaw portions, then treating said jaw portions to finish said jaws, then upsetting the other end of the blank to accumulate metal, then forming a longitudinal opening in said second upset end to provide spared jaw portionev and then subjecting said end to further treatment to form completed jaws and hearing lugs to cooperate and prevent pivoting of the fulcrum.

2. The method of: forging a fulcrum consisting in providing a hlanlt, upsetting the ends thereof to aecuiuulate si'lllicient metal to form jaws, treating the ends of said lilanlt to form longitudinal openings to term poi) tions ot' [)illli-i oil jaws, then treating mid i jaw portions for finishing said jaws, and providing hearing it :nljrurent one pair of jaws to cooperate to i ievent pivoting of tho fulcrui'l'i.

3. The method of forging a hraltc heam fulcrum consisting in proi-id'in a hlanlc, heating the ends thereof, upsetting said end: to accumulate sufliciont metal to "form jaws, treating said upset ends to form longitudinal openings at an angle with respect to each other to provide pairs of. spaced jaw nor tions, and then SlllljGCtlllQ said jaw portiii'ins to further treatment for lininhing said pain-a o'l' jaws and forming: hearing lugs adjacent one pair of jaws and extending at the same angle as the opening between the jaws at that end.

Signed at Hannnond, Indiana, this 7th day of December, 1923,

LOREN L. WHITNEY. 

